| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.providers.contacts.debug; |
| |
| import android.content.ContentProvider; |
| import android.content.ContentValues; |
| import android.database.Cursor; |
| import android.database.MatrixCursor; |
| import android.net.Uri; |
| import android.os.ParcelFileDescriptor; |
| import android.provider.OpenableColumns; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| |
| /** |
| * Provider used to read dump files created by {@link DataExporter}. |
| * |
| * We send content: URI to sender apps (such as gmail). This provider implement the URI. |
| */ |
| public class DumpFileProvider extends ContentProvider { |
| public static final String AUTHORITY = "com.android.contacts.dumpfile"; |
| public static final Uri AUTHORITY_URI = Uri.parse("content://" + AUTHORITY); |
| |
| @Override |
| public boolean onCreate() { |
| return true; |
| } |
| |
| @Override |
| public Uri insert(Uri uri, ContentValues values) { |
| // Not needed. |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int delete(Uri uri, String selection, String[] selectionArgs) { |
| // Not needed. |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { |
| // Not needed. |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String getType(Uri uri) { |
| return DataExporter.ZIP_MIME_TYPE; |
| } |
| |
| /** @return the path part of a URI, without the beginning "/". */ |
| private static String extractFileName(Uri uri) { |
| final String path = uri.getPath(); |
| return path.startsWith("/") ? path.substring(1) : path; |
| } |
| |
| /** @return file content */ |
| @Override |
| public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException { |
| if (!"r".equals(mode)) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| final String fileName = extractFileName(uri); |
| DataExporter.ensureValidFileName(fileName); |
| final File file = DataExporter.getOutputFile(getContext(), fileName); |
| return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY); |
| } |
| |
| /** |
| * Used to provide {@link OpenableColumns#DISPLAY_NAME} and {@link OpenableColumns#SIZE} |
| * for a URI. |
| */ |
| @Override |
| public Cursor query(Uri uri, String[] inProjection, String selection, String[] selectionArgs, |
| String sortOrder) { |
| final String fileName = extractFileName(uri); |
| DataExporter.ensureValidFileName(fileName); |
| |
| final String[] projection = (inProjection != null) ? inProjection |
| : new String[] {OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE}; |
| |
| final MatrixCursor c = new MatrixCursor(projection); |
| |
| // Result will always have one row. |
| final MatrixCursor.RowBuilder b = c.newRow(); |
| |
| for (int i = 0; i < c.getColumnCount(); i++) { |
| final String column = projection[i]; |
| if (OpenableColumns.DISPLAY_NAME.equals(column)) { |
| // Just return the requested path as the display name. We don't care if the file |
| // really exists. |
| b.add(fileName); |
| } else if (OpenableColumns.SIZE.equals(column)) { |
| final File file = DataExporter.getOutputFile(getContext(), fileName); |
| |
| if (file.exists()) { |
| b.add(file.length()); |
| } else { |
| // File doesn't exist -- return null for "unknown". |
| b.add(null); |
| } |
| } else { |
| throw new IllegalArgumentException("Unknown column " + column); |
| } |
| } |
| |
| return c; |
| } |
| |
| } |